nooc

commit 426dea56758255ad86a69a6b931b3332c8d2405c
parent 9d361b97dafc7bbda101f48a4ebd7edb97c796d2
Author: Nihal Jere <nihal@nihaljere.xyz>
Date:   Tue,  7 Dec 2021 11:57:43 -0600

error check on mmap

Diffstat:
M
main.c
 | 
4
++++

1 file changed, 4 insertions(+), 0 deletions(-)
diff --git a/main.c b/main.c
@@ -696,6 +696,10 @@ main(int argc, char *argv[])
 
 	char *addr = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, in, 0);
 	close(in);
+	if (addr == NULL) {
+		fprintf(stderr, "failed to map input file into memory\n");
+		return 1;
+	}
 
 	struct token *head = lex((struct slice){statbuf.st_size, statbuf.st_size, addr});
 	struct token *curtoken = head;